How does KAYAK find such low prices on flights from Ontario to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Seattle. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Ontario is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Ontario to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Ontario with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$134 CHEAP FLIGHTS from Ontario to Seattle

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

...and more

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Cheapest round-trip

$214

Typical prices: $230-$349

Alaska Airlines

Wed 2/25Wed 3/25

YYZ - SEA • Non-stop

Cheapest one-way

$134

Typical prices: $196-$465

Alaska Airlines

Tue 4/28

YYZ - SEA • Non-stop

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Seattle!

Flight Deals

Cheap Flights from Ontario to Seattle

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Ontario to Seattle

Wed, Feb 25 - Wed, Mar 25

4:45 pm - 7:18 pm

YYZ

SEA

5h 33mnonstop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$214Alaska Airlines

Wed, Apr 22 - Tue, Apr 28

4:55 pm - 7:23 pm

YYZ

SEA

5h 28mnonstop

7:55 am - 3:45 pm

SEA

YYZ

4h 50mnonstop

$215Alaska Airlines

Fri, Apr 24 - Sun, Apr 26

7:45 am - 2:19 pm

YYZ

SEA

9h 34m

1 stop

10:30 am - 10:45 pm

SEA

YYZ

9h 15m

1 stop

$217WestJet

Wed, Apr 22 - Tue, Apr 28

7:45 am - 2:19 pm

YYZ

SEA

9h 34m

1 stop

10:30 am - 10:45 pm

SEA

YYZ

9h 15m

1 stop

$218WestJet

Wed, Mar 11 - Sun, Mar 15

4:45 pm - 7:18 pm

YYZ

SEA

5h 33mnonstop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$222Alaska Airlines

Sun, Mar 1 - Sat, Mar 7

4:45 pm - 7:18 pm

YYZ

SEA

5h 33mnonstop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$224Alaska Airlines

Wed, Mar 4 - Wed, Mar 11

7:45 am - 2:19 pm

YYZ

SEA

9h 34m

1 stop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$227Multiple Airlines

Wed, Feb 25 - Wed, Mar 25

7:45 am - 2:19 pm

YYZ

SEA

9h 34m

1 stop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$229Multiple Airlines

Wed, May 6 - Fri, May 8

12:30 pm - 7:37 pm

YTZ

SEA

10h 07m

1 stop

7:15 am - 7:52 pm

SEA

YTZ

9h 37m

1 stop

$246Air Canada

Tue, Mar 3 - Wed, Mar 4

12:30 pm - 10:57 pm

YTZ

SEA

13h 27m

2 stops

5:40 am - 6:10 pm

SEA

YTZ

9h 30m

2 stops

$273Air Canada

Useful Info

Low season	January
High season	August
Cheapest flight	$134

Best time to beat the crowds but there is an average 3% increase in price.

Most popular time to fly with an average 3% increase in price.

Flight from Toronto to Seattle

How does KAYAK find such low prices on flights from Ontario to Seattle?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Seattle.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Seattle?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Ontario to Seattle?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Ontario with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Seattle?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Lynnwood

Centralia

Fife

Lakewood

Mukilteo

Westport

Lacey

Edmonds

Poulsbo

Aberdeen

Woodinville

Shoreline

DuPont

Monroe

Castle Rock

Edgewood

Everything you need to know for your flight to Seattle

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Seattle

Seattle (SEA)

$134 Find Cheap Flights from Ontario to Seattle

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

Everything you should know

Cheap Flights from Ontario to Seattle

Recent round-trip flight deals from Ontario to Seattle

Recent one-way flight deals from Ontario to Seattle

Recent last minute flight deals from Ontario to Seattle

Recent direct flight deals from Ontario to Seattle

Good to know

FAQs for booking flights from Ontario to Seattle

How does KAYAK find such low prices on flights from Ontario to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Seattle.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Ontario to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Ontario with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Seattle?

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Ontario

Complete your trip to Seattle with a hotel stay or car rental

Find direct flights for Seattle

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight